The stock board should suit you fine for now, but if you really
like to tweak the electronics and get those perfect settings, I'd suggest an aftermarket board; either Tadao or the Virtue OLED (if you have the money for the latter).
As Uziel Gal stated, an HE Bolt Kit of some sort will help (if you don't have already) if you keep running out of air during games.
The feedneck installed (Q-Lock) has a death-grip on essentially every loader out there. Plus, it's pretty low-profile, so IMHO, you're set with that.
If you're looking for an aftermarket ASA because you don't like the SP one, I suggest looking into this: http://store.deadlywind.com/product/...7baea71d6.aspx
^^^ I personally own it and love it. It's light, bleeds air, and the macroline air fitting is positioned in the center, so you don't have to worry about elbows sticking out on the side.